Epidemiology of Covid-19 in a Long-Term Care Facility in King County, Washington.

N Engl J Med. 2020 Mar 27. doi: 10.1056/NEJMoa2005412.

Epidemiology of Covid-19 in a Long-Term Care Facility in King County, Washington.

McMichael TM1, Currie DW1, Clark S1, Pogosjans S1, Kay M1, Schwartz NG1, Lewis J1, Baer A1, Kawakami V1, Lukoff MD1, Ferro J1, Brostrom-Smith C1, Rea TD1, Sayre MR1, Riedo FX1, Russell D1, Hiatt B1, Montgomery P1, Rao AK1, Chow EJ1, Tobolowsky F1, Hughes MJ1, Bardossy AC1, Oakley LP1, Jacobs JR1, Stone ND1, Reddy SC1, Jernigan JA1, Honein MA1, Clark TA1, Duchin JS1.

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Abstract BACKGROUND: Long-term care facilities are high-risk settings for severe outcomes from outbreaks of Covid-19, owing to both the advanced age and frequent chronic underlying health conditions of the residents and the movement of health care personnel among facilities in a region. METHODS: After identification on February 28, 2020, of a confirmed case of Covid-19 in a skilled nursing facility in King County, Washington, Public Health-Seattle and King County, aided by the Centers for Disease Control and Prevention, launched a case investigation, contact tracing, quarantine of exposed persons, isolation of confirmed and suspected cases, and on-site enhancement of infection prevention and control. RESULTS: As of March 18, a total of 167 confirmed cases of Covid-19 affecting 101 residents, 50 health care personnel, and 16 visitors were found to be epidemiologically linked to the facility. Most cases among residents included respiratory illness consistent with Covid-19; however, in 7 residents no symptoms were documented. Hospitalization rates for facility residents, visitors, and staff were 54.5%, 50.0%, and 6.0%, respectively. The case fatality rate for residents was 33.7% (34 of 101). As of March 18, a total of 30 long-term care facilities with at least one confirmed case of Covid-19 had been identified in King County. CONCLUSIONS: In the context of rapidly escalating Covid-19 outbreaks, proactive steps by long-term care facilities to identify and exclude potentially infected staff and visitors, actively monitor for potentially infected patients, and implement appropriate infection prevention and control measures are needed to prevent the introduction of Covid-19. Copyright © 2020 Massachusetts Medical Society.

PMID: 32220208 DOI: 10.1056/NEJMoa2005412




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